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          <h1 class="post-title" itemprop="name headline">克隆元素模拟加载效果(按钮加载)</h1>
        

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        <p>利用<code>克隆元素</code>模拟加载更多效果<br>克隆元素，在其父元素最后追加子元素，模拟列表加载<br>点击加载更多后先显示加载动画，再载入内容</p>
<a id="more"></a>
<p><em>代码如下：</em></p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * Created by Kamui on 2018/01/23.</span></span><br><span class="line"><span class="comment"> * 克隆元素模拟加载效果 按钮加载</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">var</span> module_CloneEl = (<span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">var</span> ClonedNode = <span class="function"><span class="keyword">function</span>(<span class="params">id,num</span>) </span>&#123;</span><br><span class="line">        <span class="keyword">var</span> _listNode = <span class="built_in">document</span>.getElementById(id);</span><br><span class="line">        <span class="keyword">for</span> (<span class="keyword">var</span> i = <span class="number">0</span>; i &lt; num; i++) &#123;</span><br><span class="line">            <span class="keyword">var</span> clonedNode = _listNode.cloneNode(<span class="literal">true</span>);<span class="comment">//获取被克隆节点(包括属性与子节点)</span></span><br><span class="line">            clonedNode.setAttribute(<span class="string">"id"</span>, id + <span class="string">"-"</span> + i);<span class="comment">//修改id 值，避免id 值重复</span></span><br><span class="line">            _listNode.parentNode.appendChild(clonedNode);<span class="comment">//为父节点插入克隆节点</span></span><br><span class="line">        &#125;</span><br><span class="line">    &#125;;</span><br><span class="line">    <span class="comment">//题目个数变更</span></span><br><span class="line">    <span class="keyword">var</span> changeNum = <span class="function"><span class="keyword">function</span>(<span class="params">id,el</span>) </span>&#123;</span><br><span class="line">        <span class="keyword">var</span> getNumber =  <span class="built_in">document</span>.getElementById(id).getElementsByClassName(el);<span class="comment">//获取题目个数</span></span><br><span class="line">        <span class="keyword">for</span>(<span class="keyword">var</span> i =<span class="number">0</span>; i &lt; getNumber.length; i++)&#123;</span><br><span class="line">            getNumber[i].innerHTML = i + <span class="number">1</span>;</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;;</span><br><span class="line">    <span class="comment">//加载效果</span></span><br><span class="line">    <span class="keyword">var</span>  loading = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">        <span class="function"><span class="keyword">function</span> <span class="title">$</span>(<span class="params">id</span>) </span>&#123;</span><br><span class="line">            <span class="keyword">return</span> <span class="built_in">document</span>.querySelector(id);</span><br><span class="line">        &#125;</span><br><span class="line">        $(<span class="string">".loading"</span>).style.display =<span class="string">"block"</span>;</span><br><span class="line">        $(<span class="string">".more-wrap"</span>).style.display = <span class="string">"none"</span>;</span><br><span class="line">        setTimeout(<span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">            $(<span class="string">".loading"</span>).style.display =<span class="string">"none"</span>;</span><br><span class="line">            $(<span class="string">".more-wrap"</span>).style.display = <span class="string">"block"</span>;</span><br><span class="line">        &#125;,<span class="number">1500</span>)</span><br><span class="line">    &#125;;</span><br><span class="line">    <span class="comment">//为加载更多按钮绑定事件</span></span><br><span class="line">    <span class="keyword">var</span>  addMore = <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</span><br><span class="line">        <span class="built_in">document</span>.getElementById(<span class="string">"clNode"</span>).onclick = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">            loading();</span><br><span class="line">            <span class="comment">//加载延迟</span></span><br><span class="line">            setTimeout(<span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">                ClonedNode(<span class="string">"node"</span>,<span class="number">5</span>);<span class="comment">//载入数量</span></span><br><span class="line">                changeNum(<span class="string">"Content"</span>,<span class="string">"num"</span>)<span class="comment">//改变标题数字</span></span><br><span class="line">            &#125;,<span class="number">1400</span>);</span><br><span class="line">        &#125;;</span><br><span class="line">    &#125;;</span><br><span class="line">    <span class="keyword">return</span> &#123;</span><br><span class="line">        addMore : addMore</span><br><span class="line">    &#125;</span><br><span class="line">&#125;());</span><br><span class="line"><span class="built_in">window</span>.onload = <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    module_CloneEl.addMore();</span><br><span class="line">&#125;;</span><br></pre></td></tr></table></figure>
<p><em>Demo如下</em></p>
<p><a href="http://kamui1073.oschina.io/ctb-m/app/01-%E9%A6%96%E9%A1%B5.html" target="_blank">演示demo</a></p>

      
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